DFI PM12-TC - Jumper Settings for Selecting the Cpus Front Side Bus

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Hardware Installation
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2.4 Jumper Settings for Selecting the CPU’s Front
Side Bus
CPU Front Side Bus Select - Jumper J22
The default setting of this jumper is Auto. The system will
automatically detect the front side bus of the processor installed on
the system board. Set J22 pins 2 and 3 to On if you want to set
the front side bus to 100MHz.
Important:
Overclocking may result in the processor’s or system’s instability
and is not guaranteed to provide better system performance.
2-3 On:
100MHz
1-2 On: Auto
(default)
1
2
3
1
2
3